Electric dry shaver with detachable shaving head



June 4, 1968 F. J. SCHUESSLER 3,386,167

ELECTRIC DRY SHAVER WITH DETACHABLE SHAVING HEAD Filed March 20, 1967 6 Sheets-Sheet 1 June 4, 1968 F. J. SCHUESSLER 3,386,157

ELECTRIC DRY SHAVER WITH D ETACHABLE SHAVING HEAD Filed March 20, 1967 6 Sheets-Sheet 2 June 4, 1968 F. J. SCHUESSLER 3,386,167

ELECTRIC DRY SHAVER WITH DETACHABLE SHAVING HEAD June 4, 1968 F. J. SCHUESSLER ELECTRIC DRY SHAVER WITH DETACHABLE SHAVING HEAD 6 Sheets-Sheet 4 Filed March 20, 196'? June 4, 1968 F. J. SCHUESSLER ELECTRIC DRY SHAVER WITH DETACHABLE SHAVING HEAD 6 Sheets-Sheet 5 Filed March 20, 1967 June 4, 1968 F. J. SCHUESSLER 3,336,167

ELECTRIC DRY SHAVER WITH DETACHABLE SHAVING HEAD Filed March 20, 1967 6 Sheets-Sheet 6 United States Patent 3,386,167 ELECTRIC DRY SHAVER WITH DETACHABLE SHAVENG HEAD Francis J. Schuessler, (Ihicago, lil., assignor to Sunbeam Corporation, Chicago, Ill., a corporation of Illinois Filed Mar. 20, 1967, Ser. No. 624,266 13 Claims. (Cl. 30-341) ABSTRACT 0F THE DESELQSURE An electric dry shaver having a motor enclosing housing formed by a pair or" cup-shaped members and a cover superimposed over the long hair trimmer and adapted to detachably receive an open frame of a shaving head. A channel-shaped guard is slidably received on the shaving head with portions overlying and protecting said shaving head and the long hair trimmer.

Background of the invention It is common in present day electric dry shavers to provide the shaver with 'a head for close shaving and a separate head or clipper for trimming long hair. In using the type of electric dry shaving head having an outer perforated comb which cooperates with an inner movable cutter, there is some difiiculty in cutting long hairs since a long hair will not enter the perforations in the comb as readily as the conventional beard stubble which is more erect and perpendicular to the skin and readily enters the perforations in the comb. Accordingly, with the perforated type of comb, the separate clipper or barber trimmer is required to trim sideburns and pick up hairs which have been repeatedly missed by the shaving head.

The inclusion of the close shaving head and the long hair clipper or trimmer on the same shaver housing complicates the structure of the appliance considerably. In some instances, the long hair trimmer has been closely associated with the close shaving head to the extent that they may be part of a single detachable head or assembly. A single frame may be used to support both the shaving head and the clipper. While the shaving head must normally be detachable from the shaver for cleaning purposes, there is no overriding reason to have the long hair trimmer detachable except for convenience or simplification in the construction of the shaver. Generally speaking, a more adequate long hair trimmer may be provided if it is rigidly mounted on the shaver casing. in addition, by positioning the clipper rigidly on the shaving casing, it is easier to provide a drive connection between the motor and the long hair clipper and a clutch in the drive connection. This clutch permits selective operation of the clipper and is a desirable feature since the long hair clipper is only used intenmittently.

In designing a housing for an electric shaver, one of the principal objectives to achieve is to provide a reasonably well sealed enclosure within which the shaver motor may be mounted simply and securely. During the daily use of the shaver, the hair clippings or hair chips, as they are sometimes called, fall from the shaving head and tend to be deposited on the adjacent portions of the housing. If there are any cracks or openings in the housing, the hair clippings tend to work their way into the housing as a consequence of the continuous vibration produced by the motor and the reciprocating cutting parts of the shaver. The deposit of hair clippings within the motor enclosure tends to build up to a point where the motor will ultimately be prevented from operating properly. As a consequence, it is necessary for the shaver housing to be designed with as few cracks and openings through which hair clippings may gain access to the motor enclosure. It has been found, however, that a simplified motor and housing construction may be had by forming the housing of two halves and securing the motor elements to one of the housing halves. When it is necessary to provide drive means to both a hair clipper as well as a close shaving head, the problem of maintaining the sealed arrangement of this type of split housing is made more difiicult.

Another problem presented by the shaver having both the long hair clipper and the close shaving head is that of providing a guard means to protect both the clipper and the shaving head. In some instances, the long hair clipper has been made retractable so that it may be withdrawn from its exposed use position to a concealed and protected position when it is not in use. Such a retractable mounting is costly and generally unsatisfactory. The other prior art approaches to guards for these shaving heads and long hair clippers have been generally bulky and inconvenient to assemble to and remove from the shaver.

Summary of the invention The invention relates to an electric dry shaver having a detachable close shaving head and a long hair clipper fixedly mounted on the housing of the electric shaver. The housing is defined by two cup-shaped housing members which abut along a generally common plane to define a motor enclosure with separate drive means for the long hair trimmer and the shaving head extending outwardly through openings defined between these abutting housing members. In order to minimize the leakage of hair clippings into the motor enclosing portion and to provide a means for detachably mounting the shaving head, a cover is provided which overlies the upper abutting edges of the housing members and encloses the long hair clipper with only a portion thereof extending into an exposed operative position. The shaver head is detachably supported on the cover between a pair of opposed parallel wall portions which, in turn, mount detent means for retaining the shaving head thereon.

In order to provide a guard for protecting the close shaving head as well as the long hair trimmer, there is provided a channel-shaped guard having internal grooves which cooperate with projecting ribs on the shaving head to guide the guard into assembly with the shaver and retain it in position overlying both the close shaving head and the long hair trimmer.

Accordingly, it is an object of the present invention to provide an improved dry shaver having a detachable close shaving head and a fixed long hair clipper.

It is a further object of the present invention to provide an improved dry shaver having a motor housing to which is attached a cover which serves to support the shaving head and to overlie the long hair clipper.

It is still a further object of the present invention to provide an improved shaver housin having means for sealing the motor enclosing portion against the entry of hair clippings.

It is another object of the present invention to provide an improved electric shaver having a close shaving head and a long hair clipper with guard means overlying both the shaving head and the clipper and being retained thereon by means of complementary ribs and grooves formed in the guard and the shaving head.

Further objects and advantages of the present invention will become apparent as the following description proceeds and the features of novelty which characterize the invention will be pointed out with particularity in the claims annexed to and forming a part of this specification.

Brief description of the drawings For a better understanding of the present invention,

3 reference may be had to the accompanying drawings in which:

FIG. 1 is a front perspective view of a shaver embodying my invention;

FIG. 2 is a rear perspective view of the shaver shown in FIG. 1;

FIG. 3 is an enlarged sectional view taken substantially on line 33 of FIG. 1;

FIG. 4 is an enlarged fragmentary section view taken on line 44 of FIG. 3;

FIG. 5 is a sectional view taken substantially on line 5-5 of FIG. 3;

FIG. 6 is a top plan view of the shaver of FIGS. 1 through 5 with the shaving head and the cover portion of the housing removed for the purpose of illustration;

FIG. 7 is a fragmentary top plan view of one end of the shaver shown in FIG. 6 with the long hair clipper re moved for the purpose of illustration;

FIG. 8 is a fragmentary side elevational view of the upper portion of the shaver with the head and cover portion of the housing removed as in FIG. 6;

FIG. 9 is a top plan View of the shaver with the shaving head removed and portions of the cover portion of the housing cut away for the purposes of illustration;

FIG. 10 is a fragmentary sectional view taken on line Iii-10 of FIG. 9;

FIG. 11 is a bottom plan view of the shaving head which has been removed from the shaver;

FIG. 12 is a plan view of the circuit board which supports the electrical terminals and switches with the motor ooils shown schematically therewith;

FIG. 13 is a front perspective view similar to FIG. 1 but with the shaver guard shown in assembled position;

FIG. 14 is a top plan view of the shaver of FIG. 13 with the guard also in the assembled position;

FIG. 15 is an enlarged sectional view taken on line 1515 of FIG. 14; and,

FIG. 16 is a fragmentary sectional view taken on line 16-16 of FIG. 15.

Description of the preferred embodiment There is shown in the drawings a shaver designated generally by reference numeral 20. The shaver 26 is made up of a housing or body portion 22 to which is detachably secured a shaving head 24. The housing 22 is formed by a pair of cup-shaped casing members 26 and 28. The casing members 26 and 28 form a motor enclosure 30 within which a motor 32 is mounted. The shaver housing 22 further includes a cover 34 which overlies the upper abutting edges of the casing members 26 and 28 and is formed with a central recess 36 within which the shaving head 24 is received.

Positioned at one end of the shaver adjacent to the shaving head 24 is a long hair clipper 38. The long hair clipper 38 is sometimes characterized as a barber trimmer and is used in trimming sideburns and cutting long hairs which were not cut or picked up by the close shaving head 24. For the purpose of selectively driving the long hair clipper 38, there is provided a clutch button 4% as is best shown in FIG. 1. By sliding the clutch button 46 to the left as shown in FIG. 1, a clutch mechanism is operated which drivingly interconnects the motor 32 with the long hair clipper 38. The drive connection between the motor and the long hair clipper and the clutch associated with it forms no part of the present invention and is described in detail in my copending application, Ser. No. 597,376 filed Nov. 28, 1966 and assigned to the same assignee as the instant application. Briefly, the long hair clipper 38 includes an upper fixed shearing plate 42 as is best shown in FIGS. 3, 6, and 8. The fixed shearing plate 42 is secured to upwardly extending abutments 26a and 28a formed on the casing members 26 and 28, respectively. Assembly bolts 44 extend through the plate 42 and are received in open slots 46 as are best shown in FIG. 7.

Positioned below the fixed shearing plate 42 is a movable shearing plate 48 which has teeth 48a formed along one edge which are in shearing engagement with teeth 42a formed in the fixed shearing plate 42. The movable shearing plate 48 is biased into engagement with the lower surface of the shearing plate 42 by means of helical springs 50 which are received in recesses 26b and 28b formed in the casing members 26 and 28 respectively as best shown in FIGS. 5 and 7. The casing members 26 and 28 are retained in assembled relation by means of elongated bolts 52 which extend through aligned openings in adjacent wall portions of the casin members 26 and 28. For the purpose of forming a more complete seat for the lower ends of the biasing springs 50, the recesses 26!) and 28b are closed by upward projections 54 formed on the washer-like members 55 which are received on one of the assembly bolts 52 as is best shown in FIGS. 5, 7, and 8. It should be understood that the recesses 26b and 28b are open at the top and at the side. The projections 54 close the sidewardly facing openings leaving only the up wardly facing opening into which the springs 50 may be inserted.

The movable shearing plate 48 is formed at its inner edge with a channel-shaped portion 48b. Received within the channel-shaped portion 48b are a pair of downwardly projecting nylon guide buttons 56 which are secured to the fixed shearing plate 42 and project downwardly therefrom as shown in FIG. 5. The channel 48b is formed with an opening 480 intermediate its end to receive the upper end of an oscillating drive arm 58. Adjacent the opening 480, the channel 48b is provided with downwardly projecting deformations 48d which receive and position the upper ends of the springs 50.

The motor 32 may be a conventional vibrator-type motor having a U-shaped laminated field 60 having energizing coils 62 received on each of the legs thereof. At the outer end of the field 60, there are formed pole faces 60a. Assembly screws 64 secure the field 60 to the rear case member 28. Positioned adjacent to the pole faces 60a is an armature 66 which is mounted for oscillation about pivot means 68. The springs 70 bias the armature 66 to the displaced position shown in FIG. 3. As the coils 62 are energized, the armature 66 is rotated clockwise and then rotated counterclockwise by the action of the springs 70 in a known manner. Extending from the side of the armature 66 is a drive pin 72. Adjacent the drive pin 72 is a drive arm 74 which extends to a pivotal driving connection with a radial arm 75 on a vertically extending drive member 76 as best shown in FIG. 6. The vertically extending drive member 76 has a hub portion 76a which is journalled in a pair of open slots 78 formed in the rear casing member 28. The hub portion 76a extends from the interior of the motor enclosure 30 to the exterior thereof and supports at its upper end the clipper drive arm 58. When the clutch button 46 is actuated to the left as seen in FIG. 1, the drive arm 74 is moved into driving engagement with the armature drive pin 72 causing the drive arm 74 to be reciprocated thereby oscillating the radial arm 75 and the vertically extending drive member 76, and through the connection with the drive arm 58, causing the movable shearing plate 48 to be reciprocated. Spring means, not shown, are provided to bias the drive arm 74 out of driving engagement with the pin 72 until the clutch button 40 is actuated.

As was explained above, the casing assembly bolts serve to retain the front and rear casing members 26 and 28 in assembled relation. These assembly bolts 52 are located at the upper edges of the casing members and are concealed by the cover as. To provide assembly means for the lower portions of the casing members, the casing members are formed with interengaging parts which snap into assembled relationship. These interengagjng parts are best shown in FIGS. 3 and 5 and include central guide pins 79 which engage cylindrical openings 80 and the clamping projections 81 and 82 which snap into engagement with the complementary projections 83 and 84. These assembly means are described in detail in my above-mentioned copending application.

In addition to the motor 32, there is also received in the shaver housing 22 an insulating 0r dividing wall 84 which is supported by integral projections on the opposed walls of the casing members 26 and 28. The wall 84 divides the enclosure 30 into a motor enclosing portion and a switch enclosing portion. The dividing wall 84 supports at its lower end a pair of terminal pins 86 which are received in an opening 88 adapted to receive a conventional power cord plug connector. Located upwardly from the terminal pins 86 is a rotary switch operating member 90 which has an operating portion 90a extending outwardly through an opening 91 in the housing 22 to permit manual adjustment thereof or selection of the voltage of the power source from which the shaver is to be operated. The manner in which the switch operating member 90 accomplishes the circuit changes for operation on different voltages is explained in detail below. The inner end of the switch operating member 90 extends through the insulating wall 84 and is retained thereon for pivotal movement by means of a retaining member 92. The switch operating member 90 is formed with a pair of radially extending arms 9% and 90c, as are best shown in FIG. 3. Each of the arms 90b and 90c are formed with openings in the outer ends thereof for slidably supporting bridging members 94 and 95 which are biased against the dividing wall 84 by means of springs 96 and 97.

Toward the top of the dividing wall 84, there is mounted for sliding movement a switch operating member 98. The switch operating member 93 has an inner retaining portion 98a Which extends through a slot 84a and the dividing wall 34 to retain the switch operating member 98 against outward displacement and to guide it for sliding movement. Extending outwardly from the housing 22 is a manual operating portion 98b which is received in and guided by the side walls of a slot 99 formed in the housing 22. The switch operating member 98 supports at opposite ends thereof bridging members 100 which are spring biased into engagement with the dividing wall 84.

In FIG. 12, the layout of the electrical circuit is shown partially in schematic form. Formed on the surface of the dividing wall '84 away from the motor 32 are printed circuit conducting strips 101 as shown. With the bridging contacts 100 of the switch operating member 98 in the position shown in solid lines in FIG. 12, it is evident that the coils 62 are connected in circuit with the terminal pins 86. With the rotary switch operating member 90 in the 220 volt position, the bridging members 94 and 95 occupy the solid line positions shown in FIG. 12. By tracing the circuit diagram, it is evident that the coils 62 are connected in series across the terminal pins 86. When the bridging members 94 and 95 are moved to the dotted line position, as they would be with the rotary switch operating member 90 in the 110 volt position, the coils 62 are connected in parallel across the terminal pins 86. It should be noted that the outer surface of the housing 22 is provided with suitable indicia which correlates with a slot on the operating portion 90a of the rotary switch operating member to permit setting the operating member to the desired voltage position.

It should also be noted that the diagram of FIG. 12. shows in dotted lines the positions occupied by the bridging members 100 when the sliding switch member 98 is moved to the off position. In the off position of switch member 100, both of the terminal pins 86 are disconnected from the coils 62 thereby providing a double pole switch. It should be appreciated that the insulating wall 84 provides a simple means for structurally supporting the double pole on-oif switch and the voltage selection switch along with all electrical connections and the terminal pins for the power cord. Actually, the printed circuit elements 101 on the wall 84 form the simple elements of the two switches involved.

The motor 32 is provided with an upwardly extending drive lever .102 which extends outwardly from the motor enclosure 30. The drive lever 102 will include a suitable number of cutter drive portions 102a, depending on the number of cutters in the shaving head, in this case, two. The cover 34 is formed with the opening 34a through which the drive arm 102 extends. The cover 34 serves both a decorative and a utilitarian function. From a decorative standpoint, it encloses the long hair clipper 38 and provides an attractive housing contour surrounding the head 24 and blending with the casing members 26 and 28. Perhaps more important, however, it provides a solid wall having only opening 34a whereby the leakage of hair clippings into the motor enclosure 30 is minimized. It should be noted that there is provided a plastic sealing member 103 which seals the opening between the cutter drive portions 102a and the opening 34a.

The cover 34 is formed with upstanding abutments 34b and 340 at the opposite ends thereof. These abutments 34b and 340 are separated by the central recess 36 within which the shaving head 24 is received. Facing inwardly on the abutments 34b and 340 are spaced parallel walls 34d and 34a, respectively.

The abutment 34c is hollow and receives therein the long hair clipper 38. An opening 34 extends transversely of the shaver and permits the shearing plates 42 and 48 to extend outwardly to an exposed position wherein the shearing teeth 42a and 48a are available for trimming long hairs.

In order to assemble the cover 34 to the remainder of the housing 22, there are provided a pair of vertically extending bolts 104. The nuts 105, which are received on the inner ends of the bolts 104, are captured in slots or recesses 106 formed in the rear casing member 28 as is evi dent in FIGS. 3 and 8. The recesses 106 have vertically extending access openings to permit the bolts 104 to extend therethrough. In addition, the outwardly facing opening portions are closed by transverse projections 107 formed on the adjacent casing member 26 as is shown in FIGS. 6 and 8.

Accordingly, when the casing members 26 and 28 are assembled together, the nuts 105 are trapped in position in the recess 106 whereby they may be easily engaged by the vertically extending bolts 104 after the cover 34 has been assembled to the housing 22.

The shaving head 22 is best shown in FIGS. 3, 4, and 11. It consists of a die cast supporting frame 108 having spaced parallel end plates 110 which are interconnected by longitudinally extending side walls 111. As may be seen in FIG. 16, the end plates 110 are generally U-shaped with the side walls 111 secured in a somewhat inclined position to the outer surfaces of the downwardly extending legs 110a and 11012 thereof. Supported on the side walls 111 is a perforated foil comb 11 2. The comb 1112 is joinedto the frame 108 by means of integral projections 113 extending downwardly from the side walls 111 into retaining engagement with openings 114 formed in the comb 112. As is evident from FIGS. 4 and 16, the in wardly sloping side walls 111 cause the comb to slope into the arched configuration of the shearing surface. To simplify the molding or casting of frame 108, the walls 111 are formed with notches 115 which extend vertically upwardly from projections 113. Extending across the middle of the open frame 108 is a supporting rod 116 which causes the foil comb to assume a double arched configuration. Positioned beneath the foil comb 112 are a pair of cutters 118 which are mounted for reciprocating movement in shearing engagement with the comb 112. Secured to the central portions of the cutters 118 are drive blocks 120 which receive the upper ends of the drive portions 102a of the drive lever 102. Thus, as the drive lever 102 is oscillated by the motor 32, the cutters 118 are reciprocated to and fro in engagement with the perforated comb 112. Suitable cutter biasing springs 122 are provided to act between the drive portions 102a and the cutters 118 to bias the cutters against the comb 112.

In order to support the cutters 118 with respect to the die cast frame 108 when the head 24 is removed from the shaver 2%, there is provided a cutter support 124 which is hingeably connected to the die cast frame by means of a pin 125 which is staked to one of the end plates 110. The cutter support 12 is a one piece plastic member and is molded with outwardly extending trunnions 126 which have open slots thereby permitting the trunnions 126 to be snapped into assembly with the hinge pin 125. As is best shown in FIG. 11, the cutter support 124 is formed with two adjacent openings 124a through which the drive blocks 12% extend. The drive blocks are enlarged at their lower edges so that they will not pass upwardly through the openings 11 4a. This provides an arrangement whereby the assembly of the drive blocks 120 to the cutters 118 retains the cutters with respect to the cutter support 124. The cutters 118 with their drive blocks 12%) are thus loosely assembled to the cutter support so that they may be driven in their reciprocating movement against the comb, but upon detachment of the shaving head 24 from the shaver, and upon pivoting the cutter support 124 for cleaning purposes, the cutters 11-8 will remain assembled to the cutter support 124. To retain the cutter support 124 in its closed or operative position with respect to the frame 188, there are provided molded projections 128 which resiliently engage the inner walls of the U-shaped end plates as is best shown in FIG. 11. The projections 1223 provide a retaining force which holds the cutter support in the closed position until it is manually pivoted away from the frame 1&8 to permit access to the cutters 118 and the interior of the comb 112 for cleaning purposes.

In order'to retain the shaving head 24 in assembled position on the shaver housing 22, there are provided in the walls 34a and 342 of the cover 34 slidable detent pins 130. The detent pins 13% have rounded outer ends 138a and shouldered inner ends 13Gb which limit the outward movement of the detent pins 13d through openings 34k in which they are slidably received. To bias the detent pins 130 into operative engagement with the shaving head 24, there are provided two looped biasing springs 132. Springs 132. have a central portion 132a which is received on a boss 34g formed in the bottom of the cover 34. Extending outwardly from the loop 132a are pin engaging arms 132b which, when positioned as shown in FIG. 9, are deformed to exert a biasing force against the detent pins 130. The frame 103 is formed with cam surfaces 198a at the lower edges of each of the end plates 110 to engage the detent pins 139 and deflect them inwardly as the shaving head 24 is assembled to the cover 3- Immediately above the cam surfaces 1i3a there are provided retaining recesses 10812 which receive the detent pins 130 as is best shown in FIG. 10. Thus, as the shearing head 24 is assembled to the shaver housing 22, the cam surfaces 108a force the four detent pins 130 inwardly against the biasing force of the springs 132. When the shaving head 24 has moved into seated position against the cover 34 the detent pins 13!] move outwardly into the retaining recesses 1081; thereby detachably securing the shaving head to the shaver housing 22.

For the purpose of protecting the shaving head 24 and the clipper 38 against accidental damage during periods of non-use, there is provided a plastic guard 135 which is of channel shape having side walls 135a and end walls 13517 as is best shown in FIGS. 13 through 16. The side walls of the channel-shaped guard 135 are formed with lengthwise extending grooves 1350. These grooves 135a cooperate with ribs 136 formed on the upper edges of the side walls 111 of the die cast frame 168.

As is best shown in FIG. 14, the ribs 136 curve outwardly when viewed from above and project the farthest from the central line of the shaver at their midpoints. The channel-shaped guard 135 is assembled to the shaver 22 by sliding it longitudinally with respect to the shaver head in a position with the grooves 135c aligned with and in engagement with the ribs 136. The guard 135 may he slid lengthwise with the grooves and rips so engaged until the end Wall 13612 engages the end of the shaver housing thereby locating the guard 135 in its assembled position with respect to the shaving head 24. Positioned in each groove 1350 is a protuberanre or transverse projection 135d as is best shown in FIG. 14. The projection 135d is positioned to have just passed the widest point of the ribs 136 when the guard 135 is in its assembled position. Thus, the wider portion of the rib 136 tends to prevent the guard 135 from being accidentally displaced from its assembled position on the shaver. It should be noted that the end wall 13512 has a transversely extending ridge or stop 1356 which engages the shaver housing below the clipper 38, there being a recessed portion 135 within which the clipper teeth 42a and 4811 are received. With the ridge 135s engaging the side wall of the shaver housing while the clipper teeth 42a and 48a are spaced from the guard 135 within recessed portion 135 the possibility of damage to the clipper teeth is minimized. A suitable indicating arrow 135g may be provided on the guard 135 to show the direction in which the guard should be removed from the shaver. Accordingly, there has been provided a seam molded plastic member which cooperates on assembly to protect both the shaving head 24 and the long hair clipper 38. The guard 135 cooperates directly with the ribs 136 on the shaving head and, therefore, may be used to protect the comb when it is disassembled from the shaver for any reason.

Under normal conditions of use, the guard 135 will normally be removed from the shaver immediately prior to use. After shaving has been completed, the head 24 is easily removed for cleaning by overcoming the retainin action of the pins pulling the head 24 outwardly with respect to the housing 22. By having the guard slidable on the ribs 136 to remove it from the head 24, there is no danger of inadvertently removing the shaving head 24 from the shaver along with the guard 135.

While there has been illustrated and described a particular embodiment of the present invention, it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the invention in its broader aspects, and it is, therefore,

contemplated in the appended claims to cover all such changes and modifications as fall within the true spirit .and scope of the invention.

What is claimed as new and desired to be secured by Letters Patent of the United States is:

1. In an electric dry shaver of the type having a motor, a detachable shaving head and a long hair trimmer, the combination comprising a pair of cup-shaped members which abut along a central plane to form a motor housing, means supporting said motor within said housing with a first drive means for said shaving head and a second drive means for said trimmer extending outwardly from said mot-or to the outside of said motor housing, said second drive means extending from said motor housing at a point spaced from said first drive means, said long hair trimmer being fixedly secured to said motor housing with said second drive means connected thereto, a cover overlying the upper portion of said motor housing, said cover having a first opening through which said first drive means extends and a second opening spaced from said first opening through which said long hair trimmer extends, and assembly means on said cover for detachably securing said shaving head thereon.

2. The combination of claim 1 wherein said cover comprises an elongated member having upwardly extending abutments at both ends thereof, said abut-ments having parallel opposed walls between which said shaving head is received, said long hair trimmer having clipping teeth along one edge thereof, one of said abutments being recessed to receive and partially enclose said long hair trimmer, said trimmer extending through said second opening with said clipping teeth being positioned outside of said one abutment.

3. The combination of claim 1 wherein said cover includes a pair of parallel opposed upwardly extending wall portions between which said shaving head is received, detent means extending inwardly from said wall portions, and recesses in said shaving head which receive said detent means to detachably retain said head on said cover.

4. The combination of claim 3 wherein said detent means comprise slidably movable means received in said wall portions, there being two spaced detent means in each said wall portion, a looped biasing spring for the two detent means in each said wall portion, each spring having a loop surrounding a mounting boss on the bottom of said cover with the ends of said springs in biasing engagement with said detent means.

5. The combination of claim 1 wherein the walls of said cup-shaped casing members are formed to receive and mount a pair of cover assembly means, said casing members are secured together in abutting relation by assembly bolts extending through aligned openings in adjacent edges of said casing members, said cover overlying said bolts and said edges of said casing members, threaded assembly means extending through said cover into retaining engagement with said cover assembly means to secure said cover to said motor housing, said threaded assembly means being positioned beneath said shaving head in its assembled position on said cover.

6. The combination of claim 1 wherein said cover includes a pair of upstanding spaced parallel wall portions between which said shaving head is received; said shaving head including a comb, a cutter, and a comb support; said comb support having a pair of parallel end plates interconnected by longitudinally extending side walls to define an open frame; assembly means on said side walls for supporting an arched perforated comb extending across said open frame; said end plates being positioned closely adjacent said spaced parallel Wall portions and said side walls engage opposite edges of said cover between said end walls; detent means received in said end walls and spring biased into retaining engagement with recesses in said end plates; said frame, said comb and said cover forming an enclosure within which hair clippings are received.

"7. A shaving head comprising a flexible perforated comb carried by an open supporting frame, a cutter support mounting cutting means for engagement with said comb, said frame including a pair of spaced parallel end plates interconnected by longitudinally extending side walls, said plates being inverted U-shaped members with said side walls joining the spaced legs thereof, a transversely extending pin secured to opposite legs of one of said plates adjacent the bight thereof, means pivotally connecting said cutter support to said pin, flexible a sembly means on the end of said cutter support remote from said pivotal connection, said flexible assembly means engaging in inner surfaces of the legs on the adjacent end plate to retain said cutter support in a closed position, said cutter means being enclosed between said cutter support and said comb.

8. The shaving head of claim 7 wherein said frame comprises a die casting having integrally formed inward-1y extending projections on said side walls for engagement with openings on the opposed edges of said comb, said side walls being angled downwardly to hold said comb in a shallow arched position, clearance slots extending upwardly from said projections to facilitate casing of said projections.

9. The shaving head of claim 7 wherein said cutter support comprises a molded plastic part having spaced open trunnions which snap into engagement with said pin to pivotally connect said support to said frame, and said flexible assembly means comprise integrally formed resilient projections which are deflected inwardly when said support is in the closed position.

10. The shaving head of claim 8 wherein said side walls are formed with lengthwise extending ribs which extend outwardly therefrom, a channel-shaped comb guard having a top, side walls and an end wall, open ended slots on said side Walls positioned to receive said ribs when said guard is assembled by sliding it lengthwise onto said ribs, said end Wall serving as a stop to position said guard lengthwise with respect to said comb.

11. The shaver head of claim 10 wherein said comb guard is made of a flexible material, said side walls of said comb guard being flexed outwardly in the assembled position to retain said guard thereon, said ribs being curved with the centermost portion projecting outward-1y from said side walls a greater extent than the ends, transverse ridges in said slots for retaining said guard against disassembly from said shaver head.

12. The combination of claim 1 including a guard, said guard being channel-shaped and having an end wall extending across one end of said channel, said guard in 'assembled position on said shaver overlying and protecting said shaving head and said long hair trimmer, lengthwise extending ribs on said shaving head and complementary grooves on the inner walls of said channel to receive said ribs and support said guard thereon, said end wall of said guard having an inwardly projecting stop which engages said cover below said long hair trimmer to position said guard with respect to said shaver.

13. The combination of claim 12 wherein said ribs are curved with the centermost portions projecting outwardly further than the ends thereof, said ribs being received lengthwise into said grooves when said guard is assembled to said shaver, and transverse ridges in said grooves positioned to pass over the mid portion of said ribs on assembly of said guard to said shaver to restrain said guard against lengthwise displacement.

References Cited UNITED STATES PATENTS 1,810,469 6/1931 Dremel 310--29 2,134,609 10/1938 Hay 30-43.1 X 2,370,543 2/1945 Jepson 30-341 3,027,507 3/1962 Hubner 30 -431 X 3,144,714 8/1964 Beisrna 30'43.92 3,290,774 12/ 1966 Schuessler 3034.1 3,290,777 12/1966' Jepson et al 30-4392 3,290,781 12/1966 Kratz 3043.1 X 3,319,334 5/1967 Bond et al 30-34.1 X

MYRON C. KRUSE, Primary Examiner. 

